Stereoselective ring expansion via bicyclooxonium ion. A novel approach to oxocanes

Organic Letters

Volumn 4, Issue 5, 2002, Pages 675-678

  Sakamoto, Yasuharu ^a   Tamegai, Kyoko ^a   Nakata, Tadashi ^a  

^a INST OF PHYS AND CHEMICAL RESEARCH   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001739666     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol016919k     Document Type: Article

References (32)

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29. 2 at 0°C. See ref 12 for preparation of 10b.
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31. 3) δ 74.3, 71.7, 33.9, 32.7, 22.0.
32. 1H NMR spectrum analysis of the diastereomeric mixture of their (R)-MTPA ester derivatives. This result indicates that 23b was produced via meso-bicyclooxonium ion intermediate 22.